Make a Ten

Topics
 Place Value
 Addition
 Subtraction
 Arithmetic
Description
Add numbers by making tens. Break apart and combine numbers while focusing on place value. Use the adding screen to add any two numbers. Use the game screen to apply your makeaten strategies!
Sample Learning Goals
 Improve understanding of place value by using different sizes of papers for ones, tens, and hundreds.
 Develop mental math strategies when taking apart and putting together numbers.
 Use the “make a ten” strategy when counting and doing addition.
 Develop a mental model of the basic properties of numbers including commutativity, associativity, and closure.
Standards Alignment
Common Core  Math
Teacher Tips
Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). 
Video Primer
TeacherSubmitted Activities
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HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems.
iPad:
iOS 12+ Safari
iPad compatible sims
Android:
Not officially supported. If you are using the HTML5 sims on Android, we recommend using the latest version of Google Chrome.
Chromebook:
Latest version of Google Chrome
The HTML5 and Flash PhET sims are supported on all Chromebooks.
Chromebook compatible sims
Windows Systems:
Microsoft Edge, latest version of Firefox, latest version of Google Chrome.
Macintosh Systems:
macOS 10.13+, Safari 13+, latest version of Chrome.
Linux Systems:
Not officially supported. Please contact phethelp@colorado.edu with troubleshooting issues.
Design Team  Thirdparty Libraries  Thanks To 


